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1992 Vol.1 Issue.1,
Published 1992-03-31
1
REGLONAL GOLD MINERALIZATION IN KANGDINGPANZHIHUA REGION
Luan Shiwei
The relation of mineralization wiht Kangding Group,regional regional structures and greenstone belt is discussed.The Kangding Group is the major auriferous rock series.Trace analysis of gold for 72 faults is Luding-Kongyu area ahows NNE- and NNW-trending compression and Compresso-shearing faults being gold-bearing.Gold deposits occur frequantly in the marginnal and inner parta of about 20 Circular atructures showen in remote-sensing image.The various rocks of the greenatone belt in the western and central parta of Kang-dian earth's axis are commonly high in gold Content as the souree of gold in mineralizations.On the basis of distribution of gold deposits and occutrences four Mineralization areas are recognized in this region.
1992 Vol. 1 (1): 1-7 [
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27
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8
GENSIS AND POSSIBLE PROSPECTING AREAS OF NEW TYPES OF GOLD DEPOSITS IN THE NORTHERN MARGIN OF THE NORTH CHINA PLATFORM
Wang Yiwen
The dynamic-metamorphic hydrothermal gold deposit(paishanlou type) occurred in ductile shear zone of Archeozoic greenstone formation, turbidite-hosted gold deposit occured in early or meso-Proterozoic metaclastic for-mation(Maoling type, Baiyun type),and K-altered rocks type of gold deposits related to metasomatic-anatectic granitoid are three new types of gold deposits. They were found out and prospected before bng. There are great potentail gold resources at them The potentail regional gold content and favorable remobilization agents are basic conditions for the formation of gold deposit. The basic mechanism of gold metaliogeny is characterized by double remobilization and concentration of gold in source beds. The study of stable isotope might confirm the remobilization metaliogeny of gold deposit.
1992 Vol. 1 (1): 8-17 [
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23
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18
ORIGIN AND FORMING MECHANISM OF SHUIQUANGOU SUBALKALI COMPLEX IN ZHANGJIAKOU-XUANHUA AREA, HEBEI
Wang Zhengkun, Jiang Xinmin, Wang Yu, Shang Muyuan
Subalkali magma was formed under environment of subduction of pacific plate in Mesozoic, inherited activity of Chongli-Chicheng fault and strengthening of interaction of crust and montle in plate. There are four independent series of rock with eleven kinds or rock in subalkali rocks zone. The forming mechanism of the magma is partly melting of deep material, multiple activity of magma, emplacing along regional great fault forming E-W trending linear batholith. The subalkali complex zone is related closely with gold deposits in time and space.
1992 Vol. 1 (1): 18-26 [
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17
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27
GEOLOGICAL AND GEOCHEMICAL CHARACTERISTICS OF GOLD IN THE GREENSTONE BELT OF XINTAI AREA,SHANDONG
Gao Changliang
The principal characteristics, structures and their evolution regularity of the greenstone belt of Xintai area are summerised. It is considered that the granitoid rocks were formed as mantle materials were upwelling and the greenstone belt were partially remelted. Coefficient K is got as 0.37 and used as a standard for correlating komatiites in Archean greenstone belts. Initial abundance of gold in the komatiite is 5.79 ppb in western belt and 2.37 ppb in eastern belt, suggesting inequality of gold content in the primitive mantle of this area in Archean. The atatistics of various rock types, stratigraphic units, granitoid rocks and their dikes in the greenstone belt witharithmetic and geometric mean show that increasing of variation coefficient of some rocks is favorable to dispersion and concentration of gold. Geological and geoc-hemical characteristics of gold-mineralization and halo mechanism is discu-ssed.It is recognized that in surficial gold mineralization zone the elements in passitive correlation with gold are Ag, As, Sb, Pb, Zn and in negative correlation with gold are Cu and Hg; in deep gold mineralization zone only element Sb is of passitive correlation with gold while the gold correlation coefficient of elements Ag, As, Hg, Cu, Pb, Zn is tending towards zero. Discussing genesis of greenstone type gold deposits in this area, the author proposes a metamorphic-magmatic-hydrothermal filling alterating minerogenetic mo-del and outlines preliminarily the ore-searching area.
1992 Vol. 1 (1): 27-37 [
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18
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38
GEOLOGICAL CHARACTERISTIC AND GENESIS OF MAOLING GOLD DEPOSIT SN LIAONING PROVINCE
Yu Changtao, Jia Bin, Liu Bin
Maoling gold deposit occuring in aarly Proterozoic metamorphic rocks is near Maoling granite body, which is Mesozolc in age (K-Ar age:207.8Ma). The distance that the gold deposit is apart from granite body is only 0.2km. and but Maoling granite itself is altered and mineralized. The host rocks of Maoling gold deposit are sericite phyllite and quartz sericite phyllite. The si-lification and sericitization are the chief alteration of the host rock. The or-ebodies consist of the gold-bearing quartz veinlets and the phyllite which was silicified and sericitized. The ore boundary is defined by chemical analysis.
1992 Vol. 1 (1): 38-47 [
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38
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48
ON GEOLOGICAL CHARACTERISTICS AND GENESIS OF THE MAOLING GOLD DEPOSIT
Wang Hong, Guo Jiahui
The Maoling gold deposit in Gaixiancountry, Liaoning province, occurs in the second member of Gaixian Fm. of Liaohe Gr., Which consists of phyllite,chorite-sericite phyllite and sericite-quartz phyllite with sericite quart-zite. In the miner area there are two granite masses(i.e. Maoling granite an woeongquan granite), which are of proterozoic metasomatic-anatect type.
1992 Vol. 1 (1): 48-57 [
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16
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58
A PRELIMINARY DISCUSSION ON DEPTH OF GOLD DEPOSITS IN EARLY PRECAMBRIAN METAMORPHIC ROCKS OF CHINA
Bao Qingzhong
The comparision of gold deposits in between greenstone belt abroad and Early preca-mbrian metamorphic rocks of China shows that the succession of strata, lithological characters of metamorphic rocks of Early Precambrian in China are comparable with those of greemstone belt abroad. The country rocks, ore controlling structures and occur-res of the gold deposits in the Early Pfecambrian metamorphic rocks are also similar to those in the greenstone belt abroad. It suggests the possibility of searching for deepseated gold deposits in areas of Early Precambrian metamorphic rocks and in old mines of China.
1992 Vol. 1 (1): 58-64 [
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65
1992 Vol. 1 (1): 65-69 [
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30
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70
1992 Vol. 1 (1): 70-76 [
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22
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242
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77
1992 Vol. 1 (1): 77-78 [
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26
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232
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79
1992 Vol. 1 (1): 79-79 [
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20
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193
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